git.secretlab.ca doubts

Hi,

Did I had to use uartlite.c from "Uartlite: Make console output actually
work." topic in git server instead of driver/serial/uartlite.c in mmy
kernel tree? 

and about Makefile from "Linux 2.6.25-rc7  v2.6.25-rc7" topic in git
server, Did I had to replace for my Makefile (2.6.25 from kernel.org) ?? 

When I have to use the files from git server?